745results about How to "Improve anti-scourability" patented technology

The invention discloses a brushing-proof abrasion-proof and erosion-proof ceramic paint, which is characterized by the following: selecting at least one of electric-melting brown corundum, electric-melting subwhite corundum, electric-melting white corundum, carborundum and electric melting mullite with different grain sizes as main material and at least one of compact corundum, electric-melting subwhite corundum, electric-melting white corundum, carborundum, silicon nitride and boron nitride as auxiliary material; using CA50 calcium aluminate cement or pure calcium aluminate cement as binder and nanometer micro-silica powder and active alpha-Al2O3 micropowder as reinforcer; making hyperdrying active high-effective dehydragent, sodium citrate and sodium hexametaphosphate as composite additive; loading in the strength stirrer to stir 12-17min; blending evenly; packing.

The invention discloses high-entropy alloy powder for laser cladding and a preparation method of a cladding layer. The high-entropy alloy powder comprises Ti, Zr, V, Nb, Ta and Mo. In addition, high-entropy alloy powder which comprises Ti, Zr, V, Nb, Ta, Mo and W, high-entropy alloy powder which comprises Ti, Zr, V, Nb, Ta, Mo, W and Cr and the preparation method of the cladding layer of the high-entropy alloy powder for laser cladding are provided. The high-entropy alloy powder mainly comprises two characteristics, namely, the high-entropy effect and the cocktail effect, each kind of powder exerts respective advantages, and therefore the cladding layer with high hardness, high corrosion resistance, excellent tempering softening resisting performance and excellent structure performance is obtained. Metallurgical bonding is formed by an alloy layer and a matrix through laser cladding; the bonding strength of the cladding layer and the matrix is greatly improved, and the heating speed is high; metal of the cladding layer is not prone to being diluted by the matrix; little heat deformation is generated; and therefore the part rejection rate is low.

The invention discloses a water gap lining layer material for continuous casting. The material is prepared from the following components in percent by weight: 20-60 percent of corundum, 0-30 percent of electrofusion zirconium mullite, 0-40 percent of fused silica, 3-40 percent of ceramic hollow sphere, 1-10 percent of light burning alumina, 2-6 percent of sintering assistant, 2-6 percent of phosphate bonding agent and 4-8 percent of solid phenolic resin bonding agent. A water gap for continuous casting produced by adopting the material is suitable for cold casting, and a lining basically has no nodule blocking phenomenon; the lining has high strength and does not have phenomena of chambering and abnormal erosion; a water gap has long service life; and the continuous casting production efficiency is improved.

The invention discloses an unburned magnesium-aluminum spinel brick, which comprises the following components by mass: 50-80% of corundum, 5-30% of magnesia-alumina spinels, 2-5% of magnesia powder, 3-10% of alumina powder, and the balance at least one of elemental silicon powder, metallic aluminum powder and boron carbide powder. All the components of the unburned magnesium-aluminum spinel brick are combined through an additionally added binder. The unburned magnesium-aluminum spinel brick causes no pollution to the environment, has excellent molten steel erosion resistance, slag penetration resistance and scouring resistance, and has a long service life additionally.

The invention relates to a repairing mass for repairing in the converter production process of steel making and vanadium extracting of steel enterprises, in particular to a repairing mass used for a converter lining made of magnesia carbon bricks and a preparation method thereof, and provides a repairing mass having the advantages of short sintering time and long service life for meeting the requirement of production. The repairing mass per 100 weight parts comprises the following raw materials in parts by weight: 48-60 parts of fused magnesia, 22-28 parts of magnesite clinker, 10-16 parts ofmodified asphalt, 1-5 parts of metallic aluminum powder, 1-4 parts of ferric oxide powder and 2-10 parts of adhesive. The preparation method of the repairing mass is simple and convenient, i.e. all the raw materials are mixed. In the fettling production process of the vanadium extracting converter, when a local breakage appears on the converter lining, the repairing mass is coated on the part to be repaired; the repairing mass is sintered by utilizing the wall temperature of the converter, and production by blending with iron can be carried out after sintering; and under the conditions of lowsmelting temperature (1,360-1,400 DEG C) of the vanadium extracting converter and shorter smelting period (5-10 minutes), the repairing mass still can be quickly sintered with a working lining to form an organic combination with higher strength so as to prolong the service life of the repairing mass.

The invention relates to a fast-baking explosion proof type refractory castable for blast furnace iron runner, which belongs to the field of a refractory matter. The fast-baking explosion proof type refractory castable comprises a main material and an additive, wherein the main material comprises the following ingredients by mass percent: 50-70% of high alumina granules, 10-26% of high alumina fine powder, 10-25% of silicon carbide, 1-3% of silicon oxide micropowder, 4-10% of aluminum oxide micropowder and 1-3% of aluminate cement; the additive occupies 100% in the main material; the additivecomprises the following ingredients by mass percent: 1-3% of compound antiknock substance, 1-3% of silica sol, 1-5% of slag-resistant wetting agent, 0.1-0.2% of water reducing agent and 1-5% of plastic material. According to the invention, crystalline flake graphite is adopted as the slag-resistant wetting agent to improve anti-erosion property of the refractory castable; the plastic material andthe suitable water reducing agent are adopted to prevent segregation of the crystalline flake graphite; and silica sol is adopted to improve the strength of the refractory castable. The fast-baking explosion proof type refractory castable for the blast furnace iron runner provided by the invention adopts site construction and can realize iron influx after being braked by big fire for 3-5 hours; and the fast-baking explosion proof type refractory castable has high density and strength, can bear iron slag scouring and is good in preventing the slag from penetration, good in anti-erosion property and long in service life.

The invention relates to an energy-saving high-temperature counter radiation resistant inorganic coating for coating the liner of a kiln and a preparation method thereof. The coating mainly comprises oxides, such as cobalt oxide, zirconium oxide powder, aluminum oxide and chromic oxide, and silicon powder, silicon carbide, sodium silicate, aluminium dihydrogen phosphate, silica flour, graphite powder, boron oxide and other components and is prepared by grinding, soaking, heating reaction, stirring and mixing. The coating has high thermal shock resistance, high radiation utilization rate, high corrosion resistance, high cracking resistance, high oxidization resistance and high thermal stability. The inorganic coating of the invention has the advantages of allowing for normal construction without making special modification of the basal body of the kiln, along with small investment, quick response, no toxicity, no corrosion and desirable social and economic benefits.

The invention discloses a continuous casting monolithic stopper and a method of manufacture thereof.The monolithic stopper comprises a stopper body, a steel core inserted into the stopper body and a head connected to the lower end of the stopper body, the surface of the steel core is provided with an anchor, the surface of the monolithic stopper is coated with Al2O3 coating; the stopper body is made by casting castables comprising mullite, the head is made by casting castables comprising corundum and sintered mullite, and the monolithic stopper is manufactured by monolithic casting.The stopper obtained herein is good in monolithicity, is free of brick joint and head shedding problems of sleeve brick stoppers, has good thermal shock resistance, high strength and good resistance to molten steel scour erosion, is simple to manufacture and low in cost, and is suitable for stopping a tundish nozzle under low continuous casting, high-oxygen steel continuous casting and skid flow control.

The invention discloses a side slope shallow drainage system. The bottom platform of the side slope (6) is provided with drainage ditches (4), and multiple rows and rows of drainage boreholes are densely arranged on the side slope (6). (1), the distance between the drainage boreholes (1) is 2-3m, the depth is 3-4m, and the elevation angle is 0-10°, each of the drainage boreholes (1) is provided with Drainage pipe, the slope of the slope (6) is arranged with a longitudinal micro-drainage ditch (2) and/or a transverse micro-drainage ditch (3) docked with the outlet of each of the drainage pipes, the The longitudinal miniature water collection ditch (2) and/or the horizontal miniature water collection ditches (3) communicate with the drainage ditch (4). The invention is a side slope shallow layer drainage system for quickly and efficiently discharging the groundwater infiltrated by rainfall into the shallow layer soil of the side slope.

The invention discloses a mullite steel fiber castable, which comprises the following raw materials in percentage by weight: 29 to 40 percent of brown alumina, 10 to 15 percent of high alumina bauxite clinker, 18 to 32 percent of sintered mullite, 8 to 12 percent of electric-cast mullite, 3 to 7 percent of silicon micro powder, 2 to 5 percent of coagulant and 1 to 3 percent of stainless steel fiber. The mullite steel fiber castable is prepared by stirring the mixture of raw materials which are prepared according to proportion for 5 to 10 minutes. Compared with the conventional common high alumina castable, the mullite steel fiber castable prepared by the technical scheme of the invention has high compressive strength, high rupture strength and high volume density. The mullite steel fiber castable product of the invention has high thermal shock resistance, high anti-scour performance and high volume stability.

The invention discloses an unfired magnesia-alumina spinel brick. The unfired magnesia-alumina spinel brick comprises the following chemical components by mass: 80 to 90% of fused magnesia, 5 to 15% of magnesium-rich magnesia-alumina spinel, 1 to 3% of micro alumina powder, 1 to 3% of aluminum-silicon alloy powder and 0.2 to 0.6% of B4C. The chemical components are bonded together by using 3.5 to 5 wt% of an added binder. The content of magnesium oxide in the fused magnesia is greater than 98 wt%, and the content of magnesium oxide in the magnesium-rich magnesia-alumina spinel is greater than 30 wt%. The unfired magnesia-alumina spinel brick provided by the invention has excellent slag reaction resistance, slag penetration resistance, anti-stripping performance, anti-scouring performance, resistance to oxidation and a long service life, does not include the harmful element--chromium, avoids pollution and harm to human beings and the environment, needs low production cost and has a wide application scope.

The invention provides a low-cost slag regulating agent for vanadium-extracting converter splash protection. The slag regulating agent comprises, by weight, from 20% to 50% of C, from 40% to 72% of MgO, from 4% to 7% of CaO and less than or equal to 3% of H2O, and the MgO in the slag regulating agent comprises waste magnesia carbon bricks. The low-cost slag regulating agent for vanadium-extracting converter splash protection has the advantages that waste refractory materials can be effectively utilized; and FeO in vanadium slag can be effectively reduced, the melting point and the adhesion of modified vanadium slag are improved, accordingly, a slag adhering effect can be improved after the slag regulating agent is used for regulating the vanadium slag and the modified vanadium slag is used for converter splash protection, the erosion resistivity of a furnace lining is improved, and the service life of the furnace lining of a vanadium-extracting converter is effectively prolonged.

The invention relates to an anhydrous stemming for a large and medium sized blast furnace and a preparation method of the anhydrous stemming. The stemming comprises the raw materials of bauxites aggregate and fine powder, silicon carbide aggregate and fine powder, coke, plastic clay powder, asphalt powder and a micro powder additive, the micro powder additive comprises metallic silicon powder, metallic aluminum powder, high-carbon resin powder, alumina micro powder, silica fume, sodium carboxymethyl cellulose and sodium hexametaphosphate in parts by weight, and tar is taken as a binding agent in the producing and stirring processes. The anhydrous stemming realizes high-temperature rapid sintering of the stemming, the binding degree of new and old stemming is strengthened, the capability of resisting scouring of an iron slag of a mud drum of an iron notch is improved, the porosity of the stemming material is low, the compactness of the stemming material is good, the property of resisting corrosion and permeation of an iron slag liquid of the stemming is strengthened, the stemming is favorable for keeping the depth of the iron notch and the stability of the pore size of the iron notch, and can well adapt to the performance requirement of enlargement of the blast furnace on the stemming of the iron notch.

The invention provides a spray seeding matrix and a preparation method thereof. In the spray seeding matrix provided by the invention, the soil, straw, adhesive and fertilizer are used as main raw materials which are doped with some of construction waste; and by adopting a combination of special dosage ratio, the obtained spray seeding matrix has high strength, the stability can be maintained for a long time, the fertilizer efficiency lasts long, the cost is low, and the greening effect can be effectively improved. By adding the spray seeding matrix into the construction waste, the slope stability can be effectively improved, the greening quality is increased, and the investment cost is lowered. The spray seeding matrix provided by the invention improves the problems such as relatively bad structure, relatively few granular structures and nutrient lack of the soil formed after the spray seeding of the traditional matrix and the problem of instability caused by adhesive failure. The indexes of the spray seeding matrix can reach the traditional matrix standard, wherein the early-stage growth condition of the plant, the plant biomass, the soil fertility, the erosion resistance and the like are all greatly improved. The preparation method of the spray seeding matrix provided by the invention is simple in technology, low in cost and suitable for large-scale production.

The invention discloses a method for preparing high-hardness and high-toughness abrasion resistant balls through laser cladding. The method comprises the following steps that scrap steel, chrome steel, rare earth alloy, manganese steel, molybdenum steel, vanadium steel, tungsten residues, silicon iron, titanium ingots, zirconium ingots, aluminum ingots and magnesium ingots are smelted, so that liquid alloy is obtained; ball billets are obtained by pouring the liquid alloy; tempered balls are obtained by conducting heat treatment on the ball billets; and laser cladding is conducted with Fe-based alloy and wolfram carbide (WC) powder serving as cladding powder after the tempered balls are cleaned, and the high-hardness and high-toughness abrasion resistant balls are obtained. The Fe-based alloy comprises C, Cr, Co, Ni, Mo, Ti, V and B. The power of laser cladding is 2500-3000W. The diameter of a light spot is 3-5 mm. The movement speed of the light spot is 10-15 mm/s. The thickness of a cladding layer is 5-10 [mu]m. According to the method for preparing the high-hardness and high-toughness abrasion resistant balls through laser cladding, the process is simple, conditions are easy to control, and an obtained finished product is high in hardness, good in toughness and long in service life.

The invention relates to a construction method of ecological bank revetment, in particular to a construction method of ecological bank revetment with landscape function and simple construction. In the method, triangular prism shaped building blocks are built on a bank from bottom up and connected with connection members, plant is planted on each layer of the building blocks, and an ecological corridor is formed under each layer of the building blocks. The system solves the problem that channel revetment landscape function and ecological function can not be achieved simultaneously at present. When the bank revetment is constructed, flower/grass is planted in a plant flume on the building block and matches with a shaped pattern to form a landscape wall, and the ecological corridor provides a living and habitat place for aquatic animals and microbes. The building blocks in horizontal rows are connected in series by connection members and anchored to enhance the stability of the overall structure and water flow impact resistance. The inventive landscape ecological bank revetment provides multiplication and living conditions for aquatic plant/animals and microbes, forms a small-sized ecological system where plant/animals and microbes are symbiotic and coexistent at the water area-land transitional zone of a river channel, and plays the role of river channel ecological regulation and water purification.

The invention relates to a pouring material for a cement kiln tertiary air duct. The pouring material comprises aggregate and a matrix material according to a weight ratio of 2-8: 1-3. The aggregate has particle sizes of 1-10mm and the matrix material has the particle sizes of 0.1-0.5mm. The aggregate comprises, by weight, 28-50 parts of fused magnesia, 25-45 parts of modified white alundum, 5-15 parts of zirconium mullite and 8-20 parts of magnesium aluminate spinel. The matrix material comprises magnesia powder, silicon oxide fine powder, mullite powder, alumina fine powder and andalusite. The pouring material utilizes appropriate aggregate and the matrix material and has wear resistance and corrosion resistance, a uniform degree of expansion and good thermal shock stability. Through use of a fiber additive, pouring material integrality is improved, and pouring material flexural performances and anti-erosion performances are improved. The cement kiln tertiary air duct has the advantages of long service life, long replacement period, small production cost and high production efficiency under bad conditions.

The invention provides a low-cost slag splashing protection method of a vanadium extraction converter. The slag splashing protection method comprises the following steps of: reserving a certain quantity of vanadium slag in the converter after vanadium extraction blowing is finished and semi-steel is tapped; adding 100-200 kg of slag regulating agent into one ton of vanadium slag, and blowing oxygen to melt the vanadium slag via an oxygen gun; and blowing nitrogen for slag splashing protection via the oxygen gun, wherein the slag regulating agent is waste magnesia carbon brick particles. With the slag splashing protection method, the problems of low melting point and difficult adhesion of vanadium slag can be effectively solved, the slag adhering effect can be improved during slag splashing protection, the erosion resistibility of a converter lining is increased, and the service life of the vanadium extraction converter lining is effectively prolonged.

The invention discloses a fill channel anti-frost heaving and anti-seepage structure and a construction method. The structure is characterized in that drainage channels are arranged on the two sides of the channel; a wind-blown sand layer is arranged on the bottom and two sides of an embankment of the channel; a plastic film is arranged on the wind-blown sand layer; a slope toe on a connection position of the bottom and the embankment of the channel is cast-in-place concrete; prefabricated concrete blocks are laid on the plastic film; and a capping concrete board is arranged on the top of the embankment of the channel. The construction method comprises the following steps: digging a drainage open channel; clearing channel base earth; carrying out filling to form the embankment of the channel; laying wind-blown sand; laying the plastic film; casting the arc channel-bottom concrete in place; laying the prefabricated concrete blocks; and laying the capping concrete board. The problems of the common channel design such as seepage, frost heaving and destruction, and not stable quality are eliminated, the wind-blown sand layer is arranged on the bottom and the two sides of the embankment of the channel, the foundation bearing force is increased, the frost heaving is lightened; the polyethylene plastic film is laid on the wind-blown sand layer to prevent seepage of the channel; concrete is arranged on the film to prevent water flow from scouring and seeping; the concrete arc channel bottom is cast in place, the stress condition is good and the stress concentration is prevented; and the drainage open channel prevents underground water retention and eliminates frost heaving.